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    <title>Tray Menu Demo</title>
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    <h1>Tray Menu Demo</h1>
    <p>This app will stay running even after all windows are closed.</p>
    <ul>
      <li>Use the "Open App" menu item to focus the main window (or open one if it does not exist).</li>
      <li>Change between red and green Tray icons with the "Set Green Icon" checkbox.</li>
      <li>Give the Tray icon a title using the "Set Title" checkbox.</li>
      <li>Quit the app using the "Quit" menu item.</li>
    </ul>
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